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1970 Buick Gran Sport 455 Photos, engines & full specs

Body style: Coupé (two-door)
Segment: Coupe
Production years: 1970, 1971

BUICK Gran Sport 455 1970-1971 5 Photos
BUICK Gran Sport 455 (1970-1971)BUICK Gran Sport 455 (1970-1971)BUICK Gran Sport 455 (1970-1971)BUICK Gran Sport 455 (1970-1971)BUICK Gran Sport 455 (1970-1971)

Buick dismissed the former 400 and introduced the 455 in 1970 as an alternative to the Chevelle, and it was one of the last true-blooded muscle cars made by this brand before the malaise era began.

General Motors eased the ban on its brands on placing larger than 400 cu-in engines and allowed Buick to install the monster 455 cu-in engine in the Gran Sport. After all, it was a more luxurious brand and a more expensive vehicle than most of its GM siblings. The base version had a sticker price of around 3,300 USD.

The automaker made the two-door hard-top vehicle with four headlights on the front fascia. They flanked the split grille, and underneath these, Buick installed a flush to the bodywork chromed bumper. The automaker placed two functional air intakes on the hood that fed fresh air directly to the carburetor via the air filter. From its profile, the absence of the B-pillar created a faux-cabriolet image, while the sloped-down rear end created a sporty image.

Inside, there was room enough for five adults, with two bucket seats at the front and a bench in the back. Despite the tall transmission tunnel, a third passenger could sit in the middle, mostly for short jaunts. The driver fronted the dashboard with individual clusters for dials, where the speedometer took center stage. On the left, the automaker placed the gauges for the fuel level, water temperature, and oil pressure, while on the right was the tachometer.

Even though it wasn't the most powerful version of the Gran Sport, the 455 could smoke its tires thanks to its vast, mid-range torque.

BUICK Gran Sport 455 1970, 1971
  1 gasoline engine
  • 7.5L V8 4MT RWD (355 HP)

BUICK Gran Sport 455
7.5L V8 4MT RWD (355 HP)

ENGINE SPECS - 7.5L V8 4MT RWD (355 HP)
Cylinders:V8
Displacement:7466 cm3
Power:261.1 KW @ 4600 RPM
355 HP @ 4600 RPM
350 BHP @ 4600 RPM
Torque:510 lb-ft @ 2800 RPM
691 Nm @ 2800 RPM
Fuel System:Carburettor
Fuel:Gasoline
Fuel capacity:19.8 gallons (75.0 L)
PERFORMANCE SPECS
Top Speed:111 mph (179 km/h)
Acceleration 0-62 Mph (0-100 kph):6 s
TRANSMISSION SPECS
Drive Type:Rear Wheel Drive
Gearbox:4-speed manual
BRAKES SPECS
Front:Discs
Rear:Drum
TIRES SPECS
Tire Size:G60-15
DIMENSIONS
Length:202 in (5131 mm)
Width:77.3 in (1963 mm)
Height:53 in (1346 mm)
Front/rear Track:60.1/59 in (1,527/1,499 mm)
Wheelbase:112 in (2845 mm)
Ground Clearance:6.4 in (163 mm)
Aerodynamics (Cd):0.54
Aerodynamics (frontal area):2.19 m2
Turning circle (wall to wall):43 ft (13.1 m)
WEIGHT SPECS
Unladen Weight:3898 lbs (1768 kg)
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